Gyratory crusher



2 Sheets-Sheet 1 H. S. ANDERSON GYRATORY CRUSHER 3430? 8w QM, am 5 54 Filed August 1 l U, N I H Dec. 7 1926.

H. s. ANDERSON GYRATORY CRUSHER Filed ust 1, 1925 2 Sheets-Sheet 2 w $6 2 m I l #27 i IVl/ l/JIl/rf 1 41/ 12 Q in-cantata Patented Dec. 7, 1926.

UNITED STATES HARVEY S. ANDERSON,

OF WATERVILLE, OHIO.

GYRATORY CRUSHER.

Application filed August 1, 1925. Serial No. 47,417.

This invention relates to crushers for crushing rock, ore and the like, but more particularly to so called gyratory crushers.

Gyratory Crushers are ordinarily constructed with a pair of opposed, concentric crushing faces or jaws and one of these jaws, usually the inner one is rotatable while the outer one is fixed. The rotatable jaws are usually provided with a conical head which is mounted on a shaft suspended from a spider which extends above and is connected to the feed hopper. The lower end of this shaft is gyrated so that rock, ore and the like is crushed between the conical head and the hopper or frame structure. Because of the position of the spider it is apparent that crushers of this type are not adapted to receive at one time a great amount of the material to be crushed, the spider occupying considerable space and partly closing the outer end of the ho per. Furthermore, the point of leverage o the gyrator shaft is such that the maximum power an leverage force for crushing the material is not obtained.

Objects of this invention are to overcome the above objections; to provide a gyratory crusher in which the hopper has an open outer end free from obstruction and capable of receiving a considerable amount of material to be crushed; to provide a universal mounting for the shaft of a gyratory crusher adjacent to and inwardly from the crushing head; and to provide a gyratory crusher having the new and improved features of construction, arrangement and operation hereinafter described.

The invention is shown by way of illustration in the accompanying drawings, in which,-

Figure 1 is a verticalsectional elevation of the gyratory crusher; Fig. 2 is a transverse sect-ion onthe line 22 of Fig. 1; Fig. 3 is a detail view showing the manner of connecting thewearing plate to the rotatable collar; Fig. 4 is a view taken on the line 44 of Fig. 3; Fig. 5 is a vertical sectional elevation of a modified form of crusher; Fig.

6 is a transverse section on the line 66 of Fig. 5; Fig. 7 is a vertical section on'the line 77 of Fig. 5; and Fig. 8' is a section on the line 88 of Fig. 7.

The illustrated embodiment of the invention comprises a frame 1 having an open lower en closed by a plate 2 and formed in the central part of the frame 1 is a tubular bearing portion 3. Connected to the outer ducted'by any suitable place by a chute 9.

The mechanism for gyrating the shaft 6 includes a drive shaft 10 having a drive shell 11 which may be connected to any suitable source of power, and the shaft 10 extends at substantially right angles to the gyratory shaft 6 and as bearing in the frame 1. Fixed to the inner end of the shaft 10 is a pinion 12 which meshes with a gear 13, and the gear 13 is fastened by rivets 14 to an annular flange 15 integral with a sleeve 16. Disposed within the sleeve 16 is an eccentric block 17 which is connected for rotation with the sleeve 16 by a key 18 and the block 17 is provided with an axially oii'set opening 19 to receive the end portion 20 of the gyratory shaft 6, relative movement of the end portion 20 and the block 17 being prevented by a key 21. A collar 22 surrounds the shaft 6 and rests against the block 17 to prevent dust and dirt from entering the working parts.

The gyratory shaft6 is-mounted in the tubular bearing portion 3 for universal movement so that the crushing head 9 may move to one side and then the other concomitant with the rotation thereof for exerting a crushing force in the direction of the spacer block 5. For this purpose the shaft 6 is formed with diametrically opposed trunnions 23 and surrounding the shaft 6. isa collar 24 having apertures 25 to receive the trunnion 23. Interposed between the shaft 6 and collar 24 are bushings 25 for taking up wear and formed on the collar 24 are diametrically opposed trunnions 27 extending into apertures 28 in a ring 29 which is mounted for rotative movements in the tubular bearing portion 3. The ring 29 issupported by ball'bearings 30on a screw threaded adjusting sleeve 31 which is threaded into the tubular bearing portion 3 and is held in adjusted position by means of a lock nut 32. Surrounding the shaft 6 -above' the ring 29 is a collar 29 which is provided with a tapered out end to fit against the crushing head 7 to prevent dirt and dust from entering. the universal joint. The collar 29 may be spaced from the ring 29 by an annular plate 30 having spacer elements 31.

It will thus be seen that when the shaft 6 is gyrating by means of the mechanism hereinbefore described the universal joint between the shaft and the bearing portion 3 permits the crushing head 7 to crushthe rock or other material in the direction of the spacer block 5 and the shaft acts as a lever with the universal joint serving as a fulcrum. \Vhen it is desired axially to adjust the position of the shaft 6, a set screw 33 having an enlarged bearing head 34 may be manipulatedlto adjust the shaft 6 to one position or another, and thereafter the screw threaded sleeve 31 ma i be accordingly adjusted to support the shaft. It will be seen that a screw 35 projects into a circumferential groove 36 in the eccentric block 17 so that in the adjustment of the shaft 6 the block 17 will not be moved.

To assist the action of the crushing head 7 a collar 37 surrounds the crushing head in spaced relation therefrom and is formed with an annular flange 38 which extends into an annular recess 39 formed in the spacer block 5. The greater amount of thrust during the crushing operation is exerted outwardly or upwardly and to provide for wear abrass ring 40 may be interposed between the outer surface of the flange 38 and the spacer block 5.

As indicated in Fig. 2 the spacer block 5 may be formed in two sections held together by bolts 41 and nuts 42 and a portion 43 of the block adjacent the recess 39 is cut away. The annularflange 38 is formed on its periphery with gear teeth 44 with which the teeth of a pinion 45 disposed within the cut away portion 43 of the spacer block 5 are adapted to mesh.

The pinion 45 is fixed to one end of a vertically disposed drive shaft 46 which has bearing in the frame 1 and spacer block 2. Fixed to the opposite end of the shaft 46 is a bevel pinion 47 which meshes with a pinion 48 fixed to the main drive shaft 10. From the above arrangement it will be seen that rotation of the drive shaft 10 gyrates the crushing head 7 in one direction, and rotates the collar 38 in the opposite direction so that a maximum crushing force is imparted to the material fed from the hopper 4 The inner face of the collar 37 adjacent to the crushing head 7 is preferably tapered to accord with the shape of the :crushing head and for purposes of strength the collar is constructed of a steel casting. To prevent wear from occurring on the collar 37 and to provide a renewable wearing sur' face therefor, a plurality of plates 49 are attached to the outer face of the collar 37 and are shaped to fit over the outer portion thereof. The plates 49 are preferably formed of hardened manganese steel and are removably attached to the collar 37 so that in case of wear new plates may be substituted therefor.

For attaching the plates 49 to the collar 37 the plates are formed with bosses 50 having grooves 51 terminating at their inner ends in apertures 52 which extend at right angles therefrom. The bosses 50 are adapted to project into recesses 53 formed in the collar 48 and constructed to extend into the groove 51 is a bolt 54 having an end portion 55 bent in substantially right angles to the remaining portion. The width of the groove 51 is suliicient to accommodate the bolt 54 and angular bent end portion ,so that when the end portion 55 is not disposed in the aperture 52 but abuts against the inside of the groove 51 the outer surface of the bolt 54 will be approximately flush with the outside of the groove.

lVhen the bolt is in this latter position it may be forced through an aperture in the collar 37 and thereafter when fully inserted may be moved transversely to the bottom of the groove so that the bent portion 55 is positioned in the aperture 52 of the boss. By screwing a nut 55 on the outer end portion of the rod 54 the bolt may be securely held in position so that the plate 49 is securely fastened in place. It will be understood that any suitable number of bolts may be used with each plate 49 but it has been found that a pair of such connectors has proved satisfactory for the purpose intended. f

In the modification shown in Fig. 5 the spacer block 5 is not rotatable and a bushing member 57 isprovided on the inner surface of the block 5 and this bushing may be of any suitable wear resistant material such as manganese steel. In this form the conical crushing head 7 is somewhat smaller than the conical crushing head 7 and is held in place by a nut 58, a key 59 preventing relative rotation between the crushing head and the shaft. The remaining construction of this form of crusher is substantially the same as heretofore described.

An outstanding characteristic resides in the elimination of obstructions in the feed hopper so that a greater amount of material to be crushed may be fed to the machine. Another important feature consists in providing the fulcrum for gyratory shaft adjacent to and on the inner side of-the crushing head. This effects greater leverage than has'heretofore been obtained and consequently more efiicient crushing. Other cardinal features of this invention are the universal joint for mounting the gyratory shaft and the rotatable collar surrounding the crushing head.

It will be seen that I have provided a construction which satisfies the objects enumerated above and one which constitutes a valuable advance in the art. While I have shown the invention in certain physical embodiments it is to be understood that modifications of the structure shown may be made by those skilled in the art without departing from my invention as expressed in the following claims.

IVhat I claim as new and desire to secure by Letters Patent, is

1. In a gyratory crusher, a crushing collar, a wear plate for the collar, a crushing head co-operating with the collar and exerting an upward strain thereagainst, a boss on the rear face of said plate having a substantially L- shaped groove, and an L-shaped bolt in said collar engaging said groove for detachably connecting the plate and collar whereby to hold the plate in place and free from strain.

2. In a gyratory crusher, a rotatable crushing collar, a wear plate for the collar, a crushing head co-operating with the collar and exerting a vertical and lateral strain thereagainst, a boss on the rear face of said plate having asubstantially L-shaped groove, and an L-shaped bolt in said collar engaging said groove for detachably connecting the plate and collar whereby to hold the plate in place and free from strain.

3. In a gyratory crusher, a frame, a shaft, a conical crushing head on one end of said shaft, means engaging the opposite end portion for gyrating said shaft, a universal joint for said shaft adjacent said head, and an adjustable sleeve in said frame for supporting said universal joint.

4. In a gyratory crusher, a frame, a shaft, a crushing head on one end of said shaft, means en aging the opposite end portion for gyrating said shaft, 2. universal joint for said shaft adjacent said head, an adjustable sleeve in said frame for supporting said universal joint, a collar in said frame surrounding said head, and means for rotating said collar.

In testimony whereof I have hereunto signed my name to this specification.

HARVEY S. ANDERSON. 

